Most normal people will have an accelerated heartbeat after exercise, is due to exercise will stimulate the sympathetic nerves, sympathetic excitement will make the heart beat faster, breathing heavier, the body’s large blood vessels diastolic, small blood vessels contraction, in order to make most of the blood total to the body’s organs needed, as well as the body’s large muscle groups. Another reason for a faster heartbeat is that the heart ejects blood each time, the amount of beat is basically constant, the reason for the contraction force of the heart muscle, there will be no major changes in a short period of time, but during exercise many of the organs of the person, including the large muscle groups of the body need more oxygen as well as blood supply. The original heart contraction cannot provide enough blood and oxygen in a short period of time, and can only rely on increasing the number of heart beats to maintain the cardiac output per minute. The heartbeat is bound to speed up after exercise, but if the heartbeat is particularly fast more than 150 beats per minute and does not recover all the time after the exercise is over, then consider that there may be pathological factors.